1. Semiconductor type Semiconductor gas sensor is a gas sensor that uses semiconductor gas sensing element as a sensitive element, which is the most common gas sensor, widely used in combustible gas leakage detection equipment in homes and factories, and is suitable for the detection of methane, natural gas, liquefied gas, hydrogen, etc.
2. Electrochemical formula The electrochemical gas sensor uses the electrochemical activity of the measured gas to electrochemically oxidize or restore it, so as to distinguish the gas composition and detect the gas concentration. It can accurately measure the content of trace gases (ppm level) in the air or used for environmental monitoring, such as O2, CO, H2S, CO2, SO2, NH3, HCN, HF and other corrosive or toxic gases. *Oxygen must be present to participate in the oxidative reconstitution reaction.
3. Catalytic incineration catalytic incineration gas sensor uses the thermal effect principle of catalytic incineration, under certain temperature conditions, the combustible gas produces flameless incineration under the effect of the surface of the detection element carrier and the catalyst, and outputs an electrical signal proportional to the concentration of combustible gas. By measuring the change in the resistance of the platinum wire, the concentration of flammable gases is known. It is mainly used for the detection of flammable gases, with good linearity of output signals, reliable indexes, cheap prices, and will not cause cross-infection with other non-flammable gases, and is often used for combustible gas detection in industrial sites, coal mines, civil and other places.
4. MEMS-micro electro-mechanical system is a micro-equipment or system that uses traditional semiconductor processes and materials, integrating micro-sensors, micro-actuators, micro-mechanical mechanisms, signal processing and control circuits, high-performance electronic integrated equipment, interfaces, communications and power supplies, with the characteristics of small size, low cost and high integration. With the increasing urgency of environmental needs, gas sensors, one of the "three cornerstones", are expected to become the first bright spot in the field of Internet of Things. At the same time, gas sensors with MEMS technology solutions are likely to be the next best option for integration in smartphones or wearables.
5. Infrared type is made by using the absorption effect of gas on the infrared spectrum of a specific frequency. Infrared light is emitted from the transmitter to the receiver, and when there is gas, the infrared light is absorbed, and the received infrared light is reduced, so that the gas content is detected. Good selectivity, only detect specific wavelength of gas, choose optical detection method, not easy to be affected by harmful gases and poisoning, aging; Fast response speed and good stability; It has no chemical reaction and good explosion-proof; High signal-to-noise ratio and strong anti-interference ability; Long service life; High measurement accuracy
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There are two types of encoders and common models
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Introduction to the sensor model
Proximity Switches:
NBB2-12GM50-E2 NBB2-12GM50-E0 NBN4-12GM50-E2
NBN4-12GM50-E0 NBB5-18GM50-E2 NBB5-18GM50-E0
NBN8-18GM50-E2 NBN8-18GM50-E0 NBN15-30GM50-E0
NBN15-3 ...
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Advantages of HiC2441
Technological advantages
The HiC2441 can adapt to any signal type without the need for complex configuration configurations, and users can complete loop commissioning very simply, quickly and reliably.
The HiC2441 is a universal barrier that can be adapted to any common signal type. Meantime...
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Features and functions of photoelectric switches of the sensor
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What is Pulse Ranging Technology (PRT) – a sensor
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Problems with differential pressure sensors – Blessing
1. Temperature
Excessive temperature is one of the common causes of differential pressure sensor failure, as there are many components of the differential pressure sensor that can only function properly within the specified temperature scale. During installation, if the sensor is exposed to temperatures beyond these temperature scales, it may be exposed to ...
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What are the types of displacement sensors – Doublebless
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The functional principle of MPT
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The selection of proximity sensors follows the essentials – the blessing of the United States
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Precautions for the installation of single-point load cells – we are blessed
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What capacitive proximity sensors can detect – and what we can detect
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A brief introduction and selection of encoders
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Sensor selection
The company is a company focusing on the development of mechanical motion control and sensing skills, and its products have the characteristics of high reliability, high accuracy and high protection, and play an irreplaceable role in the process of industrial production and mechanical manufacturing.
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Models of square proximity switches
NBB20-L2-E0-V1/ NPN normally open
NBB20-L2-E2-V1/ PNP normally open
NBB20-L2-A2-V1/ PNP normally open + normally closed
NBN40-L2-Z0-V1/ DC two-wire normally open
NBN40-L2-E0-V1/ NPN normally open
NBN40-L2-E2-V1/ PNP normally open
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Safety barriers are used for intrinsically safe system features
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Vibratory load cell performance – we are blessed
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Pressure control of servo presses – we are blessed
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